Abstract: A motor control device includes an acceleration portion for increasing a target number of rotations of a motor every predetermined calculation cycle until the target number of rotations of the motor reaches an upper limit number of rotations, which is set on the basis of a reached position of a driven object from a reference position, the driven object is driven by the motor so that a position of the driven object is changed, a deceleration portion for decreasing the target number of rotations of the motor every calculation cycle after the target number of rotations reaches the upper limit number of rotations, and a main control portion for controlling a drive of the motor on the basis of the target number of rotations.

Abstract: A system for detecting a backspin condition of a motor in an electrical submersible pump is described herein. The system comprises a variable speed drive for powering the motor via a power cable; and a controller, the controller having a memory, a computer processor, and a computer program product stored on the memory and executable by the processor. The computer program product comprises the instructions of: monitoring an input current or impedance on the power cable to determine changes in motor current impedance, comparing changes in the motor current impedance to a historical threshold value for backspin events to determine whether the motor is backspinning; impeding operable power to the motor when it is determined the motor is backspinning; supplying a low AC voltage to the motor after it is determined the motor is backspinning; and determining whether or not the motor has stopped backspinning by monitoring the low AC voltage.

Abstract: When it is determined that an electric storage is to be charged from a commercial power source, a controller sets a control target of a voltage of a power line to be controlled by a boost converter, based on a voltage of the commercial power source. Specifically, the controller sets the control target of the voltage to a level approximately equal to the crest value of voltage. Then, the controller outputs an input permission command to a relay circuit, and controls inverters to execute charging of the electric storage.

Abstract: A power supply device for a vehicle includes a battery serving as a first electric storage device, a battery serving as a second electric storage device, a motor generator driving a wheel, a selection switch selecting one of the first and second electric storage devices and connecting the selected electric storage device to the motor generator, and a control device controlling switching of the selection switch in accordance with a state of charge of each of the first and second electric storage devices. In the case where the selection switch selects the first electric storage device, when charging is performed and the state of charge of the first electric storage device becomes higher than a first prescribed level, the control device instructs the selection switch to select the second electric storage device.

Abstract: System and method for detecting the presence of an object in an aperture in which for modulated electromagnetic waves are directed from an edge of a frame defining the aperture and electromagnetic waves reflected from an opposite edge of the frame are received at substantially the same location. The phase change between the modulated electromagnetic waves and the reflected electromagnetic waves is measured wherein the presence of an obstacle in the aperture causes a variation in the phase change from a situation where an obstacle is not present. The system and method can be used in vehicles to determine the presence of obstacles in the path of a closing window, door, trunk lid, convertible top, or sunroof.

Abstract: The system includes a plurality of parallel-connected power field effect transistors arranged for connection in series with the traction motor with a common control circuit connected to the gate electrodes of the field effect transistors to control the on-off cycle of conduction through the field effect transistors. A plurality of parallel connected power diodes are arranged for reverse connection in parallel with the traction motor to serve as freewheeling diodes. The diodes are physically positioned apart from one another and distributed in position among the field effect transistors and each diode is positioned in a similar manner with a group of associated field effect transistors for ease of transfer of current flow between the diode and the associated field effect transistors.

Abstract: An automatic door closer providing for use as a light duty door opener and having a slip clutch for protecting the electric gear drive power unit from damage due to overspeeding on excess loads applied by overriding manual door operation. Zener diodes across the power supply to the electric drive motor effectively throw a heavy electrical load on the motor and cause the clutch to slip if the motor is sufficiently oversped and caused to act as a higher voltage bucking generator, as by manually forcing the door substantially faster in the direction in which it is being driven. A direct current motor is used at considerably lower than its rated voltage so that electrical power may be safely applied continuously for holding the door closed with the motor stalled, and without the clutch slipping, with the clutch set to slip only when the force applied thereto is significantly higher than the force required to stall the motor yet safe for the drive unit.